Finding the Fourth Proportional to 42.30, 63.48 and 21.99
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Solution
The fourth proportional to 42.30, 63.48 and 21.99 is: 33.00
Step by Step Solution
- Step 1: Write the proportion equation
42.30 : 63.48 = 21.99 : x - Step 2: Convert to fraction form
42.30/63.48 = 21.99/x - Step 3: Cross multiply
42.30x = 63.48 × 21.99 - Step 4: Simplify right side
42.30x = 1,395.93 - Step 5: Solve for x
x = 1,395.93/42.30 - Step 6: Final answer
x = 33.00
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.